摘要:
研究了4种甲虫(白星花金龟、 东方龙虱、 独角仙、 毛黄鳃金龟)鞘翅的材料力学参数及其微结构。鞘翅截面微观结构观察表明, 这4种甲虫鞘翅均由鞘翅背壁、 中空夹芯层和鞘翅腹壁构成, 背、 腹壁之间由桥墩状几丁质纤维空心柱体结构连接, 两鞘翅间以凹凸啮合结构联接。用纳米压痕仪测得这4种甲虫鞘翅背壁致密层的弹性模量均值分别为9.08、 8.21、 4.76、 6.00GPa, 硬度分别为0.44、 0.48、 0.18、 0.18GPa。用多功能材料性能实验机测定白星花金龟、 东方龙虱、 独角仙鞘翅之间的联接强度分别为46.43、 7.38、 11.34mN/mm。该研究为轻质结构的设计提供了仿生学基础。
Abstract:
The mechanical parameters and microstructures of the elytra were studied for four kinds of beetles (Potosia (Liocola) brevitarsis lewis, Cybister, Allomyrina dichotoma, Holotrichia trichophora). The elytras microstructures in cross-sections show that the elytra are composed of the compact dorse, the hollow section and the ventral face, the chitin fibre hollow-pillar structure connects the compact dorse and the ventral face, and the elytra couple each other with the concave-convex structure. The Youngs modulus and hardness of the elytra measured by the Nano Indenter SA2 (MTS) are 9.08, 8.21, 4.76, 6.00 GPa and 0.44, 0.48, 0.18, 0.18 GPa, respectively. Coupling forces between the elytra measured by a Multifunctional Test Machine are 46.43, 7.38, 11.34 mN/mm for Potosia (Liocola) brevitarsis lewis, Cybister and Allomyrina dichotoma. The research provides biomimetic information for light structure designs.
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